331406 has 4 divisors (see below), whose sum is σ = 497112. Its totient is φ = 165702.

The previous prime is 331399. The next prime is 331423. The reversal of 331406 is 604133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604133 = 191 ⋅3163.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331406.

It is an unprimeable number.

331406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82850 + ... + 82853.

It is an arithmetic number, because the mean of its divisors is an integer number (124278).

2³³¹⁴⁰⁶ is an apocalyptic number.

331406 is a deficient number, since it is larger than the sum of its proper divisors (165706).

331406 is a wasteful number, since it uses less digits than its factorization.

331406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165705.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331406 is about 575.6787298485. The cubic root of 331406 is about 69.2022352180.

Adding to 331406 its reverse (604133), we get a palindrome (935539).

It can be divided in two parts, 331 and 406, that added together give a palindrome (737).

The spelling of 331406 in words is "three hundred thirty-one thousand, four hundred six".